Excerpt of: [Talk by Rudy Guzik, 1977], shot September 16, 1977, 2 videocassettes (approx. 1 hr.): b&w, sound ; 3/4 U-Matic. Unknown camera operators. The Daniel Langlois Foundation for Art, Science, and Technology. Sonia Landy Sheridan fonds. 0501-110.